“When they tell you to grow up, they mean stop growing.”

“Growing up is a trap," snapped Dr. Robbins. "When they tell you to shut up, they mean stop talking. When they tell you to grow up, they mean stop growing. Reach a nice level plateau and settle there, predictable and unchanging, no longer a threat.”

“If a girl wants to grow up to be a cowgirl, she ought to be able to do it, or else this world ain't worth living in.”

“The unhappy person resents it when you try to cheer him up, because that means he has to stop dwelling on himself and start paying attention to the universe. Unhappiness is the ultimate form of self-indulgence. When you're unhappy, you get to pay a lot of attention to yourself. You get to take yourself oh so very seriously.”

“When you're unhappy, you get to pay a lot of attention to yourself. And you get to take yourself oh so very seriously. Your truly happy people, which is to say, your people who truly like themselves, they don't think about themselves very much. Your unhappy person resents it when you try to cheer him up, because that means he has to stop dwellin' on himself and start payin' attention to the universe. Unhappiness is the ultimate form of self-indulgence.”

“Humans have evolved to their relatively high state by retaining the immature characteristics of their ancestors. Humans are the most advanced of mammals – although a case could be made for the dolphins – because they seldom grow up. Behavioral traits such as curiosity about the world, flexibility of response, and playfulness are common to practically all young mammals but are usually rapidly lost with the onset of maturity in all but humans. Humanity has advanced, when it has advanced, not because it has been sober, responsible and cautious, but because it has been playful, rebellious, and immature.”

“Reality is subjective, and there’s an unenlightened tendency in this culture to regard something as ‘important’ only if ‘tis sober and severe. Sure and still you’re right about your Cheerful Dum, only they’re not so much happy as lobotomized. But your Gloomy Smart are just as ridiculous. When you’re unhappy, you get to pay a lot of attention to yourself. And you get to take yourself oh so very seriously. Your truly happy people, which is to say, your people who truly like themselves, they don’t think about themselves very much. Your unhappy person resents it when you try to cheer him up, because that means he has to stop dwellin’ on himself and start payin’ attention to the universe. Unhappiness is the ultimate form o’ self-indulgence.”